Been trying to get my JPN Account back...

As the title says I have been trying to get my JPN account. I've been contacting Bandai and i received an email asking for some information that I dont know what it means.

Email Translated: Bandai Namco entertainment services, as well as you will find a product, thank you. With regard to the matter of the inquiry, but Excuse me, it has become a difficult situation that from the received information to identify your account. Therefore, although it is proposed is a very trouble, we will mention your the contents of the following, what you hear from us again. ■ model name, which has been available in the relevant account ■ possession number of Tatsuishi ※ because it does not matter at approximately, I hope you enjoy described. ■ model change code issued to date ■ serial code and campaign name that you entered in the various campaign ※ code number will be of the 16-digit number. Campaign name: Serial code number: It should be noted that, when you contact the above-mentioned contents, our hope you can contact you by form to directly reply to the person e-mail. We apologize for any trouble, but thank you. NAMCO BANDAI entertainment

The information that i do not understand is the Serial Code and Campaign name? If anyone could help me i would greatly appreciate it.